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03dba698a0
This fixes bug #5878. metze
459 lines
13 KiB
C
459 lines
13 KiB
C
/*
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Unix SMB/CIFS implementation.
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smbd-specific dcerpc server code
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Copyright (C) Andrew Tridgell 2003-2005
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Copyright (C) Stefan (metze) Metzmacher 2004-2005
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Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2004,2007
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "librpc/gen_ndr/ndr_dcerpc.h"
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#include "auth/auth.h"
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#include "auth/gensec/gensec.h"
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#include "../lib/util/dlinklist.h"
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#include "rpc_server/dcerpc_server.h"
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#include "rpc_server/dcerpc_server_proto.h"
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#include "lib/events/events.h"
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#include "smbd/service_task.h"
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#include "smbd/service_stream.h"
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#include "smbd/service.h"
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#include "system/filesys.h"
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#include "libcli/security/security.h"
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#include "lib/socket/socket.h"
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#include "lib/messaging/irpc.h"
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#include "system/network.h"
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#include "lib/socket/netif.h"
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#include "param/param.h"
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struct dcesrv_socket_context {
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const struct dcesrv_endpoint *endpoint;
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struct dcesrv_context *dcesrv_ctx;
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};
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/*
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write_fn callback for dcesrv_output()
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*/
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static NTSTATUS dcerpc_write_fn(void *private_data, DATA_BLOB *out, size_t *nwritten)
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{
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NTSTATUS status;
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struct socket_context *sock = talloc_get_type(private_data, struct socket_context);
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size_t sendlen;
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status = socket_send(sock, out, &sendlen);
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NT_STATUS_IS_ERR_RETURN(status);
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*nwritten = sendlen;
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return status;
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}
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static void dcesrv_terminate_connection(struct dcesrv_connection *dce_conn, const char *reason)
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{
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struct stream_connection *srv_conn;
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srv_conn = talloc_get_type(dce_conn->transport.private_data,
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struct stream_connection);
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stream_terminate_connection(srv_conn, reason);
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}
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static void dcesrv_sock_report_output_data(struct dcesrv_connection *dcesrv_conn)
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{
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struct stream_connection *srv_conn;
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srv_conn = talloc_get_type(dcesrv_conn->transport.private_data,
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struct stream_connection);
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if (srv_conn && srv_conn->event.fde) {
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EVENT_FD_WRITEABLE(srv_conn->event.fde);
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}
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}
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static struct socket_address *dcesrv_sock_get_my_addr(struct dcesrv_connection *dcesrv_conn, TALLOC_CTX *mem_ctx)
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{
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struct stream_connection *srv_conn;
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srv_conn = talloc_get_type(dcesrv_conn->transport.private_data,
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struct stream_connection);
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return socket_get_my_addr(srv_conn->socket, mem_ctx);
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}
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static struct socket_address *dcesrv_sock_get_peer_addr(struct dcesrv_connection *dcesrv_conn, TALLOC_CTX *mem_ctx)
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{
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struct stream_connection *srv_conn;
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srv_conn = talloc_get_type(dcesrv_conn->transport.private_data,
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struct stream_connection);
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return socket_get_peer_addr(srv_conn->socket, mem_ctx);
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}
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static void dcesrv_sock_accept(struct stream_connection *srv_conn)
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{
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NTSTATUS status;
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struct dcesrv_socket_context *dcesrv_sock =
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talloc_get_type(srv_conn->private, struct dcesrv_socket_context);
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struct dcesrv_connection *dcesrv_conn = NULL;
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if (!srv_conn->session_info) {
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status = auth_anonymous_session_info(srv_conn,
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srv_conn->event.ctx,
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srv_conn->lp_ctx,
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&srv_conn->session_info);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0,("dcesrv_sock_accept: auth_anonymous_session_info failed: %s\n",
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nt_errstr(status)));
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stream_terminate_connection(srv_conn, nt_errstr(status));
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return;
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}
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}
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status = dcesrv_endpoint_connect(dcesrv_sock->dcesrv_ctx,
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srv_conn,
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dcesrv_sock->endpoint,
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srv_conn->session_info,
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srv_conn->event.ctx,
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srv_conn->msg_ctx,
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srv_conn->server_id,
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DCESRV_CALL_STATE_FLAG_MAY_ASYNC,
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&dcesrv_conn);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0,("dcesrv_sock_accept: dcesrv_endpoint_connect failed: %s\n",
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nt_errstr(status)));
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stream_terminate_connection(srv_conn, nt_errstr(status));
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return;
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}
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dcesrv_conn->transport.private_data = srv_conn;
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dcesrv_conn->transport.report_output_data = dcesrv_sock_report_output_data;
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dcesrv_conn->transport.get_my_addr = dcesrv_sock_get_my_addr;
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dcesrv_conn->transport.get_peer_addr = dcesrv_sock_get_peer_addr;
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if (dcesrv_sock->endpoint->ep_description->transport == NCACN_NP) {
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dcesrv_conn->auth_state.session_key = dcesrv_inherited_session_key;
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}
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srv_conn->private = dcesrv_conn;
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irpc_add_name(srv_conn->msg_ctx, "rpc_server");
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return;
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}
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static void dcesrv_sock_recv(struct stream_connection *conn, uint16_t flags)
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{
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NTSTATUS status;
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struct dcesrv_connection *dce_conn = talloc_get_type(conn->private, struct dcesrv_connection);
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DATA_BLOB tmp_blob;
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size_t nread;
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if (dce_conn->processing) {
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EVENT_FD_NOT_READABLE(conn->event.fde);
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return;
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}
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tmp_blob = data_blob_talloc(conn->socket, NULL, 0x1000);
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if (tmp_blob.data == NULL) {
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dcesrv_terminate_connection(dce_conn, "out of memory");
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return;
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}
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status = socket_recv(conn->socket, tmp_blob.data, tmp_blob.length, &nread);
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if (NT_STATUS_IS_ERR(status)) {
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dcesrv_terminate_connection(dce_conn, nt_errstr(status));
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return;
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}
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if (nread == 0) {
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talloc_free(tmp_blob.data);
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return;
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}
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tmp_blob.length = nread;
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dce_conn->processing = true;
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status = dcesrv_input(dce_conn, &tmp_blob);
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dce_conn->processing = false;
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talloc_free(tmp_blob.data);
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EVENT_FD_READABLE(conn->event.fde);
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if (!NT_STATUS_IS_OK(status)) {
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dcesrv_terminate_connection(dce_conn, nt_errstr(status));
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return;
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}
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if (dce_conn->call_list && dce_conn->call_list->replies) {
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EVENT_FD_WRITEABLE(conn->event.fde);
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}
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}
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static void dcesrv_sock_send(struct stream_connection *conn, uint16_t flags)
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{
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struct dcesrv_connection *dce_conn = talloc_get_type(conn->private, struct dcesrv_connection);
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NTSTATUS status;
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status = dcesrv_output(dce_conn, conn->socket, dcerpc_write_fn);
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if (NT_STATUS_IS_ERR(status)) {
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dcesrv_terminate_connection(dce_conn, "eof on socket");
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return;
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}
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if (!dce_conn->call_list || !dce_conn->call_list->replies) {
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EVENT_FD_NOT_WRITEABLE(conn->event.fde);
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}
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}
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static const struct stream_server_ops dcesrv_stream_ops = {
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.name = "rpc",
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.accept_connection = dcesrv_sock_accept,
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.recv_handler = dcesrv_sock_recv,
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.send_handler = dcesrv_sock_send,
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};
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static NTSTATUS dcesrv_add_ep_unix(struct dcesrv_context *dce_ctx,
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struct loadparm_context *lp_ctx,
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struct dcesrv_endpoint *e,
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struct event_context *event_ctx, const struct model_ops *model_ops)
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{
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struct dcesrv_socket_context *dcesrv_sock;
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uint16_t port = 1;
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NTSTATUS status;
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dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
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NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
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/* remember the endpoint of this socket */
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dcesrv_sock->endpoint = e;
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dcesrv_sock->dcesrv_ctx = talloc_reference(dcesrv_sock, dce_ctx);
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status = stream_setup_socket(event_ctx, lp_ctx,
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model_ops, &dcesrv_stream_ops,
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"unix", e->ep_description->endpoint, &port,
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lp_socket_options(lp_ctx),
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dcesrv_sock);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0,("service_setup_stream_socket(path=%s) failed - %s\n",
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e->ep_description->endpoint, nt_errstr(status)));
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}
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return status;
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}
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static NTSTATUS dcesrv_add_ep_ncalrpc(struct dcesrv_context *dce_ctx,
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struct loadparm_context *lp_ctx,
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struct dcesrv_endpoint *e,
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struct event_context *event_ctx, const struct model_ops *model_ops)
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{
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struct dcesrv_socket_context *dcesrv_sock;
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uint16_t port = 1;
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char *full_path;
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NTSTATUS status;
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if (!e->ep_description->endpoint) {
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/* No identifier specified: use DEFAULT.
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* DO NOT hardcode this value anywhere else. Rather, specify
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* no endpoint and let the epmapper worry about it. */
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e->ep_description->endpoint = talloc_strdup(dce_ctx, "DEFAULT");
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}
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full_path = talloc_asprintf(dce_ctx, "%s/%s", lp_ncalrpc_dir(lp_ctx),
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e->ep_description->endpoint);
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dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
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NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
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/* remember the endpoint of this socket */
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dcesrv_sock->endpoint = e;
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dcesrv_sock->dcesrv_ctx = talloc_reference(dcesrv_sock, dce_ctx);
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status = stream_setup_socket(event_ctx, lp_ctx,
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model_ops, &dcesrv_stream_ops,
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"unix", full_path, &port,
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lp_socket_options(lp_ctx),
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dcesrv_sock);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0,("service_setup_stream_socket(identifier=%s,path=%s) failed - %s\n",
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e->ep_description->endpoint, full_path, nt_errstr(status)));
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}
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return status;
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}
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static NTSTATUS dcesrv_add_ep_np(struct dcesrv_context *dce_ctx,
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struct loadparm_context *lp_ctx,
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struct dcesrv_endpoint *e,
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struct event_context *event_ctx, const struct model_ops *model_ops)
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{
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struct dcesrv_socket_context *dcesrv_sock;
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NTSTATUS status;
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if (e->ep_description->endpoint == NULL) {
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DEBUG(0, ("Endpoint mandatory for named pipes\n"));
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return NT_STATUS_INVALID_PARAMETER;
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}
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dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
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NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
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/* remember the endpoint of this socket */
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dcesrv_sock->endpoint = e;
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dcesrv_sock->dcesrv_ctx = talloc_reference(dcesrv_sock, dce_ctx);
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status = stream_setup_named_pipe(event_ctx, lp_ctx,
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model_ops, &dcesrv_stream_ops,
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e->ep_description->endpoint, dcesrv_sock);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0,("stream_setup_named_pipe(pipe=%s) failed - %s\n",
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e->ep_description->endpoint, nt_errstr(status)));
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return status;
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}
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return NT_STATUS_OK;
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}
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/*
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add a socket address to the list of events, one event per dcerpc endpoint
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*/
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static NTSTATUS add_socket_rpc_tcp_iface(struct dcesrv_context *dce_ctx, struct dcesrv_endpoint *e,
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struct event_context *event_ctx, const struct model_ops *model_ops,
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const char *address)
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{
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struct dcesrv_socket_context *dcesrv_sock;
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uint16_t port = 0;
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NTSTATUS status;
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if (e->ep_description->endpoint) {
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port = atoi(e->ep_description->endpoint);
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}
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dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
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NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
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/* remember the endpoint of this socket */
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dcesrv_sock->endpoint = e;
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dcesrv_sock->dcesrv_ctx = talloc_reference(dcesrv_sock, dce_ctx);
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status = stream_setup_socket(event_ctx, dce_ctx->lp_ctx,
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model_ops, &dcesrv_stream_ops,
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"ipv4", address, &port,
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lp_socket_options(dce_ctx->lp_ctx),
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dcesrv_sock);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0,("service_setup_stream_socket(address=%s,port=%u) failed - %s\n",
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address, port, nt_errstr(status)));
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}
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if (e->ep_description->endpoint == NULL) {
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e->ep_description->endpoint = talloc_asprintf(dce_ctx, "%d", port);
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}
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return status;
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}
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static NTSTATUS dcesrv_add_ep_tcp(struct dcesrv_context *dce_ctx,
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struct loadparm_context *lp_ctx,
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struct dcesrv_endpoint *e,
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struct event_context *event_ctx, const struct model_ops *model_ops)
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{
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NTSTATUS status;
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/* Add TCP/IP sockets */
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if (lp_interfaces(lp_ctx) && lp_bind_interfaces_only(lp_ctx)) {
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int num_interfaces;
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int i;
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struct interface *ifaces;
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load_interfaces(dce_ctx, lp_interfaces(lp_ctx), &ifaces);
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num_interfaces = iface_count(ifaces);
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for(i = 0; i < num_interfaces; i++) {
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const char *address = iface_n_ip(ifaces, i);
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status = add_socket_rpc_tcp_iface(dce_ctx, e, event_ctx, model_ops, address);
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NT_STATUS_NOT_OK_RETURN(status);
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}
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} else {
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status = add_socket_rpc_tcp_iface(dce_ctx, e, event_ctx, model_ops,
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lp_socket_address(lp_ctx));
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NT_STATUS_NOT_OK_RETURN(status);
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}
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return NT_STATUS_OK;
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}
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static NTSTATUS dcesrv_add_ep(struct dcesrv_context *dce_ctx,
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struct loadparm_context *lp_ctx,
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struct dcesrv_endpoint *e,
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struct event_context *event_ctx, const struct model_ops *model_ops)
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{
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switch (e->ep_description->transport) {
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case NCACN_UNIX_STREAM:
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return dcesrv_add_ep_unix(dce_ctx, lp_ctx, e, event_ctx, model_ops);
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case NCALRPC:
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return dcesrv_add_ep_ncalrpc(dce_ctx, lp_ctx, e, event_ctx, model_ops);
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case NCACN_IP_TCP:
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return dcesrv_add_ep_tcp(dce_ctx, lp_ctx, e, event_ctx, model_ops);
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case NCACN_NP:
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return dcesrv_add_ep_np(dce_ctx, lp_ctx, e, event_ctx, model_ops);
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default:
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return NT_STATUS_NOT_SUPPORTED;
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}
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}
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/*
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open the dcerpc server sockets
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*/
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static void dcesrv_task_init(struct task_server *task)
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{
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NTSTATUS status;
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struct dcesrv_context *dce_ctx;
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struct dcesrv_endpoint *e;
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dcerpc_server_init(task->lp_ctx);
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task_server_set_title(task, "task[dcesrv]");
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status = dcesrv_init_context(task->event_ctx,
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task->lp_ctx,
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lp_dcerpc_endpoint_servers(task->lp_ctx),
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&dce_ctx);
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if (!NT_STATUS_IS_OK(status)) goto failed;
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/* Make sure the directory for NCALRPC exists */
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if (!directory_exist(lp_ncalrpc_dir(task->lp_ctx))) {
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mkdir(lp_ncalrpc_dir(task->lp_ctx), 0755);
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}
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for (e=dce_ctx->endpoint_list;e;e=e->next) {
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status = dcesrv_add_ep(dce_ctx, task->lp_ctx, e, task->event_ctx, task->model_ops);
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if (!NT_STATUS_IS_OK(status)) goto failed;
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}
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return;
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failed:
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task_server_terminate(task, "Failed to startup dcerpc server task");
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}
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NTSTATUS server_service_rpc_init(void)
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{
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return register_server_service("rpc", dcesrv_task_init);
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}
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